Model 7280 7/8 Diameter 10 Turn Wirewound Precision Potentiometer MODEL STYLES AVAILABLE 7281 1/8 Shaft, 1/4 Bushing 7283 1/8 Shaft, Servo 7284 6 mm shaft, 3/8 Bushing 7286 1/4 Shaft, 3/8 Bushing 7288 (for heavy side load applications) 1/4 Shaft, 3/8 Bushing 1 ELECTRICAL Resistance Range 100 to 100K ohms Standard Resistance Tolerance 5% Minimum Practical Resistance Tolerance 1% 2 Independent Linearity 0.25% Minimum Practical Independent Linearity 0.15% (<300 ohms), 0.075% (300 ohms) Power Rating 2.0 Watts at 70C, derating to 0 at 125C Dielectric Strength 1,000 V rms Insulation Resistance 1,000 Megohms minimum Noise 100 ohms maximum Actual Electrical Travel 3600 +10 -0 (>100 ohms), 3600 +10 -5 (100 ohms) End Voltage maximum 0.25% of input voltage Tap Tolerance 3 MECHANICAL Total Mechanical Travel 3600 +15 -0 Number of Gangs 2 maximum Weight (single gang) 0.75 oz. nominal Backlash 1 maximum 7281, 7284, 7286, 7288 7283 Static Stop Strength maximum 48 oz.-in. 36 oz.-in. Panel Nut Tightening Torque maximum 25 lb.-in. n/a Shaft End Play maximum 0.010 0.005 Shaft Runout maximum T.I.R. 0.003 0.002 Pilot Diameter Runout maximum T.I.R. 0.004 0.002 Lateral Runout maximum T.I.R. 0.005 0.004 Shaft Radial Play maximum 0.003 0.002 Start/Run Torque (per gang, ES option adds 0.5 oz.-in.) maximum 0.8 oz.-in. 0.6 oz.-in. 1 Specifications subject to change without notice. 2 Linearity is measured between 1% and 99% of input voltage. RoHS 2 Pb compliant BI Technologies Corporation 4200 Bonita Place, Fullerton, CA 92835 USA Phone: 714 447 2345 Website: www.bitechnologies.com September 1, 2015 Model 7280 page 1 of 4Model 7280 ENVIRONMENTAL (MIL-PRF-12934) Operating Temperature Range -40C to +125C dynamic, -55C to +125C static Temperature Cycling 5 cycles, -55C to +125C, maximum 5% R Shock 6 ms Saw-tooth, 100 Gs, 0.1 ms maximum discontinuity Vibration 15 Gs, 10 to 2,000 Hz, maximum 5% R, 0.1 ms maximum discontinuity Moisture Resistance Five 24 hour cycles, maximum 3% R High Temperature Exposure 1,000 hours at 125C, maximum 5% R Rotational Load Life (1 lb side load for 7288) 1M shaft revolutions + 900 hours at 2.0 Watts & 70C, maximum 5% R Ingress Protection Rating (IP Code) IP50, IP66 available as option (feature code ES) ORDERING INFORMATION 7286 R 10K T2 L.25 xx Optional Feature Code (see table) Model Series No code required for slotted shaft 7284/7286/7288 or for plain shaft 7281/7283 Linearity Resistance Prefix Resistance Value Optional Non-standard Tolerance FEATURE CODES STANDARD RESISTANCE VALUES 7281, 7283 plain shaft no Theoretical 7284, 7286, 7288 slotted shaft code Total Resistance Resolution Tempco of wire (Ohms) (% nominal) (ppm/C) Center Tap CT 100 0.059 20 Linearity Tape LT 200 0.037 20 Flatted Shaft FS 500 0.030 20 Slotted Shaft (standard on single cup 7284, 7286 & SS 7288 without RS feature) 1K 0.024 20 Rear Shaft Extension (7281, 7286, 7288 single cup RS 2K 0.020 20 only) 5K 0.018 20 Shaft Lock (7286 & 7288 only) SL 10K 0.017 20 High Torque 2-6 oz.-in. (7286 & 7288 only) HT 20K 0.016 20 Additional Gang 2G 50K 0.010 20 Gold Plated Solder Lug Terminals (see optional FT terminal configuration) 100K 0.008 20 Seal (IP66) 7284, 7286, or 7288 only ES When multiple Feature Codes are used the P/N shall be in the CIRCUIT DIAGRAM same sequence as listed in this table (top to bottom). (S) (CCW) (CW) BI Technologies Corporation 4200 Bonita Place, Fullerton, CA 92835 USA Phone: 714 447 2345 Website: www.bitechnologies.com September 1, 2015 Model 7280 page 2 of 4